TRANSPARENT COLORED COSMETIC INGREDIENT FOR COSMETIC PRODUCTS, POSSIBLY CAPABLE OF AUTOMATICALLY CHANGING COLOR WHEN IRRADIATED BY ULTRAVIOLET LIGHT

Smart overview of the Invention

The patent application describes a cosmetic ingredient designed for use in cosmetic products, featuring a unique polymer structure. This structure incorporates an emollient or film-forming cosmetic polymer that remains transparent to light. An organic chromophore molecule, either fixed color or photochromic, is chemically linked into this polymer. The photochromic molecules can rapidly change color when exposed to ultraviolet (UV) light, offering dynamic color-changing properties.

Chemical Integration

The colored or photochromic molecule is chemically integrated into the polymer through transesterification with a cosmetic oil that has specific functionalities for anchoring the molecule. This oil can be a silicone macrodiol functionalized with a photochromic derivative. This setup ensures a smooth transition between a colorless and a colored state upon UV irradiation, enhancing the versatility of the cosmetic product.

Example Formulations

• Eye Shadow Example 1: Contains 72% dye and 14% of the innovative ingredient (SAMPLE I), alongside other components like viscosifiers and skin conditioning agents.
• Eye Shadow Example 2: Utilizes 28% dye and 20% of SAMPLE I, with additional ingredients such as matting agents and preservatives.
• Lip Gloss Example 3: Features 5% dye and 7% SAMPLE I, complemented by emollients and skin conditioning agents.
• Lip Gloss Example 4: Incorporates minimal dye (0.1%) but includes 4% SAMPLE I, with solvents and plasticizers for texture enhancement.

Additional Composition

An additional lip gloss composition is highlighted, employing a different cosmetic material (SAMPLE II) at 29% by weight. This composition maintains its film-forming function while providing a fixed color feature, demonstrating the versatility of the ingredient across different cosmetic products.

Advantages

The primary advantage of this innovation is its ability to maintain the main cosmetic function of emollient or film-forming oils while adding color-changing capabilities through photochromic molecules. This allows existing formulations to be enhanced with dynamic color properties without compromising other essential characteristics such as texture, sensory experience, or durability.